How many O2 sensors does a 2004 Dodge Durango have?

According to the search results, the number of oxygen (O2) sensors in a 2004 Dodge Durango can vary depending on the emission package. Here is the information gathered from the search results:
– On certain non-California (Federal) emissions packages, the vehicle may use a total of either 2 or 4 sensors. With this emission package, 2 sensors are used: upstream (referred to as 1/1) and downstream (referred to as 1/2). The upstream sensor (1/1) is located just before the main catalytic converter.
– In a forum post, a user mentioned that they have a 2004 Dodge Durango with four sensors: one upstream and one downstream with each catalytic converter.
Based on this information, it seems that the number of O2 sensors in a 2004 Dodge Durango can vary depending on the emission package. It is recommended to consult the vehicle’s manual or contact a Dodge dealership for the most accurate information specific to your vehicle.

Do you have to replace both O2 sensors at the same time?

Manufacturers recommend replacing O2 sensors in pairs (both Upstream or both Downstream).

How do I know which O2 sensor is bad?

What Are the Symptoms of Bad Oxygen Sensors?

1. Oxygen Sensor: How it Works. Most oxygen sensors generate an electrical signal that tells your car’s Powertrain Control Module how much to alter the air-fuel mixture.
2. Illuminated Check Engine Light.
3. Poor Gas Mileage (Plus Bad Smells & Black Smoke)
4. Poor Engine Performance.

How many O2 sensors are there?

Most cars have at least two oxygen sensors located throughout the exhaust system; at least one in front of the catalytic converter and one or more downstream from the catalytic converter. The “pre-cat sensor” regulates fuel supply, while the downstream sensor measures the efficiency of the catalytic converter.

What would cause all 4 O2 sensors to go bad?

Why do O2 sensors fail? Since the oxygen sensor is in the exhaust stream, it can become contaminated. Common sources of contamination include an excessively rich fuel mixture condition or oil blow-by in an older engine and engine coolant being burnt in the combustion chamber as a result of an engine gasket leak.

Should I replace all 4 O2 sensors at once?

Do I need to replace all of the sensors at once? It is best to replace O2 sensors in pairs. For example, if you replace the downstream left sensor, you should also replace the downstream right.

How many O2 sensors does a v6 have?

Modern vehicles with V-6 or V-8 engines could have as many as four O2 sensors — one located in each cylinder bank and one after each catalytic converter. If either the oxygen sensor in the cylinder block or the one for the catalytic converter fails, your vehicle could experience serious engine problems.

How do I know if it’s my catalytic converter or O2 sensor?

To check if it’s a clogged cat versus a bad oxygen sensor (when you don’t have a check engine light), grab a vacuum gauge. Connect the gauge to an intake manifold vacuum line. Start the engine, let it idle, and check the reading on the gauge. This is your baseline vacuum.

What are the symptoms of a bad O2 sensor?

Signs a Vehicle has a Bad O2 Sensor

• Check Engine Light Comes On.
• Noticeable Loss of Fuel Efficiency.
• Sulfur or ‘Rotten Egg’ smell from Exhaust.
• Black smoke from exhaust.
• Emission levels reach high levels.
• Your engine hesitates, skips, begins bucking or has power surges.

Will an O2 sensor work without a catalytic converter?

an O2 sensor does not need a cat to function properly. There are aftermarket fuel injection systems that use an O2sensors to keep fuel mixture anywhere you want, usually way richer then is safe with a cat. The sensor just reports free oxygen, the software it reports to does whatever it’s written to do.

Does a bad O2 sensor affect the catalytic converter?

The Problems A Bad O2 Sensor May Cause
One of the most devastating things that can be a result of a failed oxygen sensor is a catalytic converter failing suddenly, which might put a big dent in your pockets.